WASHINGTON — Americans ramped up purchases of new homes in October after three months of soft sales, evidence that the housing recovery is improving fitfully. Sales of new homes grew 25.4 percent to a seasonally adjusted annual rate of 444,000, the Commerce Department said Wednesday. That was the largest monthly percentage increase since May 1980.

But the increase came after sales had fallen 6.6 percent in September to a 354,000 annual rate, the weakest since April 2012.